Device for recording documents transmitted by radio



E. BELIN Nov. 18, 1930.

DEVICE FOR RECORDING DOCUMENTS TRANSMITTED BY RADIO Filed Nov. 2, 1929Patented Nov. 18, 193% 7 UNITED STATS EDOU'ARD BELIZE, OF PARIS,FRAIi'GE DEVICE FOR RECORDING DOCUMENTS TRANSMITTER) BY RADIOApplication filed November 2, 1929, Serial No. 404,458, and in FranceNovember 10, 1928.

In my two French Patents Nos. 673,695 and 678,622, respectively ofAugust 22 and November 6, 1928, I described an assembly of devices whichallowed receiving stations, whether a subscriber or not, to receive on arecording cylinder by electro-chemical means, documents transmitted by aradio broadcasting station by means of variations in current orradio-electric transmission. In

. the said patents, the surface for recording is carried by a cylinderand must be changed each time a transmission is terminated.

According to my present invention the recording takes place in acontinuous manner and not on individual papers, but on a sheet which isdisplaced in a cc ntinuous way from 8. containing roller and eitherrewound on a rewinding roller or accumulated in a receptacle, basket, orsimilar object, the remaining parts of the device being unchanged.

, The sensitized paper which was used in the two patents above referredto and in my French patent of addition No. 36,297 of .October 30, 1927,is therefore wound on a bobbin from which it unrolls freely over aseries of suitable guides and then forms a tubular shape about arecording cylinder whose axis is parallel to the direction of movementof the band of paper which cylinder remains stationary and acts as aplaten.

From the cylinder the paper moves toward the outlet of the apparatus andthrough analogous guides its plane form is restored thereto after whichit passes between rollers or drums which-draw the same and impartdisplacement thereto for either rewinding or for allowing to accumulatefreely. This movement as before stated is continuous.

Consequently, since the recording cylinder is stationary, the recordingcan be brought about in a plane perpendicular to the axis of saidcylinder. As a result of this arrangement successive spirals take placeas in the patents above pointed out. For producing this result two meansare possible, to wit, the rotation of the tracing stylus about therecording cylinder or the rotation of the paper being displaced linearlyin which case the whole band of paper is rotated about the axis of therecording cylinder. In either case the rotation of either the stylus orthe paper taken in combination with the linear displacement of the paperin either case, the stylus is caused to advance in a helicoidal manneralong the cylinder or vice versa when the stylus remains stationary inspace.

My invention is based upon these principles above outlined and will nowbe described in detail with reference to the accompanying drawingforming a part of this specification and in which Fig. 1 is aconventional diagram of my invention illustrating an embodiment in whichthe stylus is rotated;

Fig. 2 is a similar View illustrating another embodiment of my inventionin which the paper sheet is rotated and the stylus remains stationary;

Fig. 3 is a sectional detail along the line 33 of Fig. 2; and

Fig. 4 is a sectional detail along the line 44 of Fig.2

Referring to the drawing more in detail and particularly to Fig. l, thepaper 1 is unwound from a bobbin 2 and preferably wound and drawn alongby a second bobbin 3, but in some cases may be drawn along by rollersand allowed to accumulate freely, such rollers not being shown on thedrawing. By means so of gradually decreasing arcuate guides 4, 5 and 6,the strip of paper'l is given a tubular shape about a cylinder 7 whichis stationary. Analogous guides 4, 5 and 6 arranged to graduallyincrease outwardly from the other end of the cylinder restore the flatform to the paper strip 1.

Disposed in a plane perpendicular to the axis of cylinder 7 is a ring 8suitably guided and adapted to be rotated about the cylinder 7 by meansof a worm meshing with ring 8 as shown at 9. The pinion 9 is adapted tobe given a synchronized movement with respect to the transmitter as more,fully described in the patents above referred to. Within the ring 8 issecured a stylus P for recording to which leads one of the wires of thecircuit as more fully explained in the patents above called toattention. From the foregoing it will be obvious that by the combinationof the circle described by the'stylus in the same planeand the lineardisplacement of the paper strip, recording will take place on the saidstrip in spirals in continuous manner.

Adverting to Figs. 2 to l, the bobbins 2 and 3 and the paper guides 4, 5and 6 and 4, 5' and 6 are all mounted in a rotary frame 10 adapted to bedriven by a suitable motor M about the axis of cylinder 7 subjected to asynchronizing movement. The ring '8 is rotatably mounted in the frame 10and maintained stationary either by its own weight, or preferably by theattraction of a magnet E, or both these expedients, Within the ring 8 ismounted the stylus P as before.

From the foregoing it will be obvious that the strip of paper beneaththe stylus is given a helicoidal displacement and here again therecording will take place in the form of spirals.

While I have described what I deem to be the preferred formsiof myinvention I do not wish to be limited thereto as there might be changesmade in the construction and arrangements of the parts without departingfrom the spirit of the invention as comprehended within the scope of theappended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent is: r

1. In a devicefor recording documents transmitted by radio thecombination of a paper strip, means for imparting linear displacement tosaid strip, means for forming a cylindrical shape of a portion of saidstrip, a rotary ring surrounding said cylindrical portion, a stylus insaid ring for said strip, and a worm for imparting rotary motion to saidring.

2. In a device for recording documents transmitted by radio thecombination of a paper strip, means for imparting linear displacement tosaid strip, a stationary cylinder adapted to receive said strip, aplurality of decreasing arcuate guides adapted to curve said strip oversaid cylinder, a second plurality of arcuate guides of increasing sizeadapted to allow said paper to take a plane shape, a stylus for saidstrip, and means for producing relative rotary movement between saidstylus and the cylindrical portion of said strip.

3. In a device for recording documents transmitted by radio thecombination of a paper strip, means for imparting linear displacement tosaid strip, a stationary cylinder adapted to receive said strip, aplurality of decreasing arcuate guides adapted to curve said strip oversaid cylinder, a second plurality of'oi arcuate guides of increasingsize .adapted to allow saidapaper to take a plane shape, a stylus for'sai strip, and means for imparting rotary motion to said strip.

signature.

EDOUARD BELIN.

